CN101908350A - The manufacture method of rotating disk and rotating disk - Google Patents
The manufacture method of rotating disk and rotating disk Download PDFInfo
- Publication number
- CN101908350A CN101908350A CN2010101985055A CN201010198505A CN101908350A CN 101908350 A CN101908350 A CN 101908350A CN 2010101985055 A CN2010101985055 A CN 2010101985055A CN 201010198505 A CN201010198505 A CN 201010198505A CN 101908350 A CN101908350 A CN 101908350A
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- plate member
- resin
- rotating disk
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
- G11B17/02—Details
- G11B17/022—Positioning or locking of single discs
- G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
- G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/2009—Turntables, hubs and motors for disk drives; Mounting of motors in the drive
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- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The rotating disk of recording disk drive unit, have the plate member that constitutes by strong magnetic material and be configured in the central authorities of above-mentioned plate member and parts that fuse that the injection mo(u)lding by resin forms are central resin component, above-mentioned plate member has the plate peripheral part and has plate central portion above being positioned at plate medium pore that the central authorities of above-mentioned plate member form and with respect to above-mentioned plate peripheral part, and above-mentioned central resin component has the resin cylindrical portion that connects above-mentioned plate medium pore and constituted central resin through hole, the dish guide portion of boot disk medium pore, the resin linking part that on above-mentioned dish central portion, above-mentioned resin cylindrical portion and above-mentioned dish guide portion is linked up.The invention also discloses the manufacture method of rotating disk.
Description
Technical field
The present invention relates to rotating disk, motor and recording disk drive unit that recording disk is used.
Background technology
In the past, in the recording disk drive unit, the rotating disk that recording disk is installed was set on motor.Existing rotating disk has turntable body and central principal axis.Turntable body is made of magnetic.Central principal axis forms with resin, becomes parts with turntable body.
Summary of the invention
Therefore, cover by resin above the rotor yoke and below structure in, when injection mo(u)lding, can on resin surface, produce distortion such as contraction.And, can produce weld mark at the final filling position of resin.On the periphery on resin component top, be provided with the peripheral part chimeric with the medium pore of recording disk, if the contraction of resin takes place on top or forms weld mark, forming disk guide portion accurately then.
And, in that fixing using under the situation of magnet is set on the rotating disk, the back of the body yoke (back yoke) that expands to rotating disk inside is set, if but being provided with to fix on fixator uses magnet, and then will not carry on the back yoke and expand to rotating disk inside.
The present invention is directed to above-mentioned problem and make, its purpose is to prevent central resin component, particularly coils resin shrinkage on the guide portion.
The rotating disk of the recording disk drive unit of first aspect present invention, have the plate member that constitutes by strong magnetic material and be configured in the central authorities of above-mentioned plate member and the parts of the one that the injection mo(u)lding by resin forms are central resin component, above-mentioned plate member has the plate peripheral part and has plate central portion above being positioned at plate medium pore that the central authorities of above-mentioned plate member form and with respect to above-mentioned plate peripheral part, and above-mentioned central resin component has the resin cylindrical portion that connects above-mentioned plate medium pore and constituted central resin through hole, the dish guide portion of boot disk medium pore, the resin linking part that on above-mentioned plate central portion, above-mentioned resin cylindrical portion and above-mentioned dish guide portion is linked up.
The rotating disk of the recording disk drive unit of second aspect present invention, have the plate member that constitutes by strong magnetic material and be configured in the central authorities of above-mentioned plate member and the parts of the one that the injection mo(u)lding by resin forms are central resin component, it is the plate medium pore that above-mentioned plate member has medium pore, above-mentioned central resin component possesses the resin cylindrical portion with the central resin through hole that connects above-mentioned plate medium pore, the dish guide portion of boot disk medium pore, on above-mentioned plate member, have the resin linking part that above-mentioned resin cylindrical portion and above-mentioned dish guide portion are linked up, be provided with a plurality of cast gate otch (gate cut) portion in the injection mo(u)lding on the top of above-mentioned central resin component.
The manufacture method of the rotating disk of the recording disk drive unit of third aspect present invention comprises: the plate member that is made of strong magnetic material is installed on a side of two moulds, forms the operation of die cavity (cavity) by the above-mentioned plate member matched moulds of clamping; Form the operation of central resin component as the parts of one in the central authorities of above-mentioned plate member by in above-mentioned die cavity, injecting resin, in the operation that forms above-mentioned central resin component, in above-mentioned die cavity, inject resin from a plurality of cast gates that are provided with in the position corresponding with the top of above-mentioned central resin component.
According to the present invention, can prevent central resin component, particularly coil resin shrinkage on the guide portion.
Description of drawings
Fig. 1 is the cut-open view of recording disk drive unit.
Fig. 2 is the cut-open view of motor.
Fig. 3 is the vertical view of plate member.
Fig. 4 is the cut-open view of plate member.
Fig. 5 is the vertical view of rotating disk.
Fig. 6 is the vertical view of rotating disk.
Fig. 7 is the cut-open view of rotating disk.
Fig. 8 is the upward view of rotating disk.
Fig. 9 is the upward view of rotating disk.
Figure 10 is for amplifying the figure of expression pawl.
Figure 11 makes the figure of the flow process of rotating disk for expression.
Figure 12 is the figure of expression mould and plate member.
Figure 13 is the figure of expression mould and plate member.
Figure 14 is the figure of expression mould and plate member.
Figure 15 is the vertical view of plate member in another example of expression.
Figure 16 is the vertical view of plate member in other examples of expression.
Figure 17 is the vertical view of rotating disk.
Figure 18 is the vertical view of plate member in other examples.
Figure 19 is the cut-open view of motor of other examples of display plate parts.
Symbol description
1... motor; 2... rotating part; 3... stationary part; 4... Bearning mechanism; 9... recording disk; 10... recording disk drive unit; 11... access portion; 12... shell; 13... rotating disk; 51... plate peripheral part; 52... plate central portion; 55... plate medium pore; 61... resin cylindrical portion; (63... central resin component) top; (64... central resin component) bottom; 81... cover half; 82... dynamic model; 89... die cavity; 91... dish medium pore; 122... fixator; 123... fixed magnet; 131... plate member; 132... central resin component; (521... plate member) hole portion; 611... central resin through hole; 631... dish guide portion; 632... resin linking part; (632a... the resin linking part) peripheral part; 633... pawl; 634a... cast gate notch; 641... cyclic resin recess; 672... supporting pin recess; 811a... cast gate; 823... supporting pin; J1... central shaft.
Embodiment
In this manual, abbreviate the upside of central shaft J1 direction as " upside ", downside abbreviates " downside " as.And, in explanation of the present invention, when up and down each position component relation and direction being described, only relation of the position in the presentation graphs and direction, the position when being not the equipment of packing into actual concerns and direction.
Fig. 1 is comprising the plane side cross sectional view of central shaft for the recording disk drive unit 10 with motor of an embodiment of the present invention.Recording disk drive unit 10 has motor 1, access portion 11 and the two is placed in the shell 12 of inner case shape.In Fig. 1, shell 12, fixator 122, fixed magnet 123 and recording disk 9 have been represented with double dot dash line.Motor 1 is kept by chassis 121.Access portion 11 has 111 and head moving mechanism 112.111 is to carry out light mechanism for picking that the information of recording disk 9 is read and/or write.As recording disk 9, for example adopt Blu-ray disc.Head moving mechanism 112 makes 111 to move with respect to motor 1 and recording disk 9.111 have light injection part and light accepting part.The light injection part is ejaculation laser below recording disk 9.Light accepting part receives the reflected light from recording disk 9.
On shell 12, be provided with not shown conveying mechanism.Carry out recording disk 9 to the insertion of shell 12 with from the taking-up of shell 12 by conveying mechanism.In addition, the fixator 122 with fixed magnet 123 is set in shell 12.
After recording disk 9 inserted, the dish medium pore 91 of the central authorities of recording disk 9 was configured in the top of the rotating disk 13 of motor 1.And motor 1 rises, and recording disk 9 is positioned over rotating disk 13.Fixed magnet 123 is from the plate member of the metal of top vacuum chuck turntable 13, thereby by fixator 122 recording disk 9 is fixed on the rotating disk 13.
In recording disk drive unit 10, recording disk 9 is by motor 1 rotation, and head moving mechanism 112 makes 111 to move to desired location, carries out reading and/or writing the information of recording disk 9.When taking out recording disk 9, fixator 122 leaves from recording disk 9, and motor 1 descends, and recording disk 9 is taken off from rotating disk 13.
Fig. 2 is the longitudinal section of motor 1.It is rotating part 2 that motor 1 has the rotation assembly, fixedly assembly is stationary part 3, rotating disk 13, Bearning mechanism 4.Rotating part 2 is supported for respect to stationary part 3 and can be rotated above it by Bearning mechanism 4.Rotating disk 13 is arranged on the upper end of rotating part 2.
Rotating part 2 includes lid cup parts 21 roughly cylindraceous, circular rotor magnet 22.Rotor magnet 22 is installed in the medial surface of the cylindrical portion of cup parts 21.Central authorities at cup parts 21 are provided with axle fixed part 23 cylindraceous.The axle 41 of Bearning mechanism 4 inserts axle fixed part 23 and is fixed in cup parts 21.
The peripheral part that plate member 131 has a plate member 131 is that the central portion of plate peripheral part 51, plate member 131 is plate central portion 52, the bend 53 between plate central portion 52 and plate peripheral part 51.Plate peripheral part 51 is approximately perpendicular to central shaft J1.Plate central portion 52 is approximately perpendicular to central shaft J1, is positioned at the top with respect to plate peripheral part 51.On rotating disk 13, between the fixed magnet 123 and plate peripheral part 51 of Fig. 1, can produce sufficient magneticaction.Therefore, plate member 131 can be selected cheap material as long as be soft strong magnetic material.Thus, can make rotating disk 13 at an easy rate.
Central authorities' resin component 132 is configured in the substantial middle of plate member 131, and the injection mo(u)lding by resin forms.Thus, plate member 131 and central resin component 132 become parts.And injection mo(u)lding is than punching press machine-shaping precision height.Particularly, the error moulding of plate member 131 about, the error moulding of the mold component of making central resin component 132 about with 5 μ m～10 μ m with 50 μ m.Central authorities' resin component 132 is outstanding upward with respect to plate peripheral part 51.Central authorities' resin component 132 is the integral body of overlay central portion 52 and bend 53 almost, can prevent that therefore plate member 131 from separating from central resin component 132.Central authorities' resin component 132 is for example formed by polycarbonate resin materials such as (PC).
Central authorities' resin component 132 has resin cylindrical portion 61, dish guide portion 631, resin linking part 632, a plurality of pawl 633.Central resin component 132 integral body that comprise these positions form the parts of an one.Resin cylindrical portion 61 has the inboard of the plate medium pore 55 that the substantial middle of plate member of being located at 131 is provided with and the central resin through hole 611 of run-through board medium pore 55.Central resin through hole 611 is fixed on the top of axle 41.
A plurality of pawls 633 a plurality of positions that 63 peripheral part promptly coils guide portion 631 on top are provided with, from dish guide portion 631 to being the radial outside at center with central shaft J1 and extending downwards.Between dish guide portion 631 and pawl 633, form lower cut (under cut).Below, will be radially the abbreviating as of center " radially " with central shaft J1, be circumferentially the abbreviating as of center " circumferentially " with central shaft J1.
The recording disk 9 of Fig. 1 in the time of on being installed to rotating disk 13, will coil medium pore 91 to pawl 633 guiding by dish guide portion 631, and pawl 633 contacts with dish medium pore 91.Then, recording disk 9 disposes on plate member 131.Say it is that recording disk 9 disposes exactly on the ring-shaped rubber on the plate member 131 133.Under this state, pawl 633 is supported by resin linking part 632, and towards the radially inner side elastic deformation.Utilize the elastic deformation of pawl 633, thereby the center of recording disk 9 is positioned on the central shaft J1 exactly.Therefore, transfer the recording disks such as Blu-ray disc of core performance, also can on rotating disk 13, install accurately even have relatively high expectations.
Fig. 3 is the vertical view of plate member 131.Fig. 4 is the cut-open view of locational plate member 131 of the arrow A of Fig. 3.In 7 positions of plate member 131 upper punch cutting plate peripheral parts 51 and bend 53, thereby upwards forming 7 openings 54 week.3 breach 551 that slave plate medium pore 55 extends towards radial outside are set on plate medium pore 55.As shown in Figure 3, to be central shaft J1 extend greater than the modes of 90 degree with angulation each other at the center of 3 breach 551 slave plate medium pores 55.On the outer edge of plate peripheral part 51, form other breach 511.
Fig. 5 and Fig. 6 are the vertical view of rotating disk 13.In Fig. 6, to central resin component 132 additional parallel oblique lines.Fig. 7 is the cut-open view of locational rotating disk 13 of the arrow B of Fig. 5.In Fig. 7, be represented by dotted lines the part of the inboard shape of plate member 131.Below, also be same for other figure.As Fig. 5 and shown in Figure 7, on resin linking part 632 and dish guide portion 631, stride these positions 7 recesses 634 of depression downwards equally spaced are set on circumferentially.As described later, when injection mo(u)lding central authorities resin component 132, inject resin from the die cavity of cast gate in mould that is provided with in the position corresponding with recess 634.From the mold separation profiled member time, at the gate cutting resin, the cast gate trace that therefore forms convex on recess 634 is cast gate notch 634a.
Fig. 8 and Fig. 9 are the upward view of rotating disk 13.In Fig. 9, to central resin component 132 additional parallel oblique lines.Below, also be same for other identical figure.As shown in Figure 7 and Figure 8, being positioned at respect to plate member 131 on the bottom 64 of downside of central resin component 132, the cyclic resin recess 641 of depression upward is set around central resin through hole 611.When injection mo(u)lding central authorities resin component 132, the multiple pin of configuration in die cavity, a plurality of recesses 671,672 of the trace of formation expression pin on cyclic resin recess 641 thus.
Figure 10 is near the figure the pawl 633 that amplifies presentation graphs 5.In Figure 10, to the parallel oblique line of central resin component 132 additional spacer broads, the parallel oblique line narrower to plate member 131 additional spacers.And, be represented by dotted lines the part that is covered by central resin component 132 in the edge 541 of opening 54 of plate member 131.As Fig. 7 and shown in Figure 10, in central resin component 132, the edge 541 of opening 54 is provided with resin bed 65.
Resin bed 65 at the thickness on the direction of vertical center axis J1, be the bee-line between interior week of the edge 541 of opening 54 and resin bed 65, the insufficient infusion (short) of resin when preventing injection mo(u)lding and forming more than the 0.5mm.More preferably, even under the viscosity condition with higher of resin, in order to prevent the output quantity deficiency of resin really, above-mentioned thickness forms more than the 0.7mm.And blocked up in order to prevent resin bed 65, above-mentioned thickness forms below the 1mm.And, consider resin flow and can form the range of size of resin bed, can set multiple size and be not limited to above-mentioned numerical value.
Be parallel to pawl position through hole 66 overlapping on the direction of central shaft J1 in the formation of the inboard of resin bed 65 with pawl 633.As shown in Figure 7, the top of pawl 633 is positioned at pawl position through hole 66.As shown in Figure 5, pawl 633 and pawl position through hole 66 are equal number, and a pawl position through hole 66 is corresponding with a pawl 633.Plate member 131 can be guaranteed intensity with having in central authorities to compare with the plate member of the overlapping bigger circular open of a plurality of pawls position through hole 66.
Then, with reference to Figure 11 the flow process of making rotating disk 13 is described.At first, a plurality of plate member 131 moulding (step S11) by punch process.A plurality of plate member 131 be placed in fixed holding part.In holding part, the breach 511 of the outer edge of plate member 131 shown in Figure 3 becomes the state with the bar-like member butt, and the circumferential position of a plurality of plate member 131 is circumferential towards substantially constant.Like this, breach 511 is used for determining the circumferential position of plate member 131 before being installed on mould temporarily.Thus, be easy to carry out the installation of plate member 131 with respect to mould.
Then, conveying mechanism adsorbs maintenance to a plate member 131 and it is taken out from holding part.As shown in figure 12, under the state of horizontal direction, plate member 131 utilizes attractive force of magneticaction or air etc. to be installed on dynamic model 82 (step S12) at the central shaft J1 of plate member 131.Dynamic model 82 and plate member 131 along central shaft J1 near cover half 81.As shown in figure 13, cover half 81 and dynamic model 82 grip block parts 131, and cover half 81 and dynamic model 82 carried out matched moulds.Between cover half 81 and dynamic model 82, form die cavity 89 (step S13).
On the face relative with cover half 81, being provided with central shaft J1 is the mould annular convex 826 at center, and a plurality of supporting pins 823 are outstanding from mould annular convex 826.Supporting pin 823 is the face butt on the right side among Figure 13 below plate central portion 52, and relative with the cast gate 811a of running channel 811.Supporting pin 823 is with respect to the resin flow back up pad central portion 52 from cast gate 811a.
And, on dynamic model 82, be provided for two kinds of somatotype pin 824a, 824b from the mold separation profiled member.It is poor that the top of somatotype pin 824a has ladder, the part on top and plate peripheral part 51 butts.Be positioned at the somatotype pin 824b of radially inner side with respect to somatotype pin 824a, relative with plate central portion 52.And in fact somatotype pin 824b is arranged on the position different with cross section shown in Figure 13.On plate central portion 52, in plate medium pore 55, insert central pin 825.Central pin 825 is positioned at inboard position with respect to the recess 813 of cover half 81.
After to cover half 81 and dynamic model 82 matched moulds, in die cavity 89, inject resin (step S14) with high pressure from cast gate 811a.Resin is expanded to following side from the upper face side of plate member 131, fully fills to comprise die cavity 89 integral body that claw type becomes space 891 and resin bed formation space 892.As mentioned above, in dynamic model 82, therefore supporting pin 823 back up pad central portions 52 can prevent owing to the distortion that is pushed the plate central portion 52 that causes by resin flow.Consequently, can prevent the axial offset of plate peripheral part 51.
When hardening of resin and after forming central resin component 132, as shown in figure 14, dynamic model 82 separates from cover half 81.At this moment, resin cylindrical portion 61 contacts with central pin 825, and cyclic resin recess 641 contacts with mould annular convex 826.Therefore, rotating disk 13 leaves from cover half 81 with dynamic model 82.
And somatotype pin 824a, 824b gentlier push 11 positions of rotating disk 13 as among Fig. 8 shown in the additional parallel oblique line, and conveying mechanism adsorbs maintenance to rotating disk 13, thereby rotating disk 13 separates (step S15) from dynamic model 82.
As shown in Figure 7, in central resin component 132, form pawl 633 and resin bed 65 becoming space 891 and resin bed to form on the corresponding position, space 892 with the claw type of Figure 13.Resin bed 65 covers the edge 541 of openings 54, thereby forms the pawl position through hole 66 overlapping with opening 54.
On cyclic resin recess 641, form from the following recess 671 (hereinafter referred to as " register pin recess 671 ") of depression upward in the position corresponding with register pin 821.In register pin recess 671, expose the inner peripheral surface of location division 551.Form from the following recess 672 (hereinafter referred to as " supporting pin recess 672 ") of depression upward in the position corresponding with supporting pin 823.In supporting pin recess 672, expose the following part of plate member 131.As shown in Figure 8, register pin recess 671 on circumferentially between supporting pin recess 672.
In the inboard of resin linking part 632 shown in Figure 7, form diameter to dip plane that radial outside increases gradually.Between the medial surface of dip plane and resin cylindrical portion 61,, form separatrix (parting line) by contacting of cover half shown in Figure 13 81 and central pin 825.And in motor 1, the axle 41 of Fig. 2 is positioned at the below with respect to the separatrix, and axle 41 does not contact with the separatrix.
Thereafter, rotating disk 13 is placed in the container of regulation by conveying mechanism.As shown in Figure 7, in plate member 131, plate central portion 52 is outstanding upward with respect to plate peripheral part 51, thus the thickness attenuation of the central resin component 132 of the top of plate member 131.Thus, even the rotating disk 13 of the top integral body of overlay central portion 52 also can promptly coil the generation that guide portion 631 prevents resin shrinkage by significant dimensions portion.
The bend 53 of plate member 131 and plate central portion 52 are according to the shape formation of the outside surface that coils guide portion 631 and resin linking part 632.And, plate member 131 be positioned at the thickness of the resin part of upside with respect to bend 53 and plate central portion 52, roughly form same degree.Therefore can prevent the generation of resin shrinkage.
Because plate central portion 52 is set, therefore can expand the contact area of central resin component 132 and plate member 131 on plate member 131.And, make plate central portion 52 be positioned at upside with respect to plate peripheral part 52.Because this formation can utilize resin that plate central portion 52 is sandwiched up and down, can expand the contact area of central resin component 132 and plate member 131.Therefore, can prevent that plate member 131 and central resin component 132 from peeling off.
And the cast gate 811a of the running channel 811 of Figure 13 is positioned at the top of plate member 131, thereby forms the dish guide portion 631 on top of central resin component 132 and the pawl 633 that extends from this top accurately downwards.And, as shown in Figure 5, making progress in week, cast gate notch 634a is between pawl 633 and pawl 633.That is, cast gate becomes between the parts 812,822 at two group of first and second claw type of adjacency shown in Figure 13.Thus, can prevent that weld mark is positioned at dish guide portion 631.
Owing to make cast gate 811a be positioned at the top of plate member 131, therefore can become space 891 potting resins to claw type in period more early.Therefore, it is thin and require high-precision pawl 633 and avoid producing and shrink to make other position on the wall ratio central authorities resin component 132 accurately.
As shown in Figure 7,, the cyclic resin recess 641 of attenuate is set, thereby therefore the resin thickness between attenuate bottom 64 and the plate member 131 can prevent that the resin on the bottom 64 from shrinking in the bottom 64 of central resin component 132.And, also prevented the resin shrinkage on the resin cylindrical portion 61.
After making a rotating disk 13, take out new plate member 131 from holding part, carry out step S12～S15, on plate member 131, form central resin component 132.As mentioned above, make a plurality of rotating disks 13 in turn.And ring-shaped rubber 133 is attached at plate member 131 in subsequent handling.
In rotating disk 13, the operation (step S15) of separating with dynamic model 82 from cover half 81 at central resin component 132 also can be removed the resin bed 65 (step S16) that forms afterwards between the edge 541 of opening 54 and pawl position through hole 66.Thus, can realize the lightweight of rotating disk 13.And the operation of removing resin bed 65 also can be carried out after making a plurality of rotating disks 13 in the lump.
As mentioned above, in the manufacturing of rotating disk 13, first and second claw types become parts 812,822 not contact with the opening 54 of plate member 131, thereby are easy to prevent that first and second claw types from becoming the interference of parts 812,822 and plate member 131.Thus, can prevent that first and second claw types from becoming the damage of parts 812,822.
Suppose, if first and second claw types become parts 812,822 to contact with the edge 541 of the opening 54 of plate member 131, then, therefore can become to produce unexpected minim gap between parts 812,822 and the edge 541 at first and second claw types because the machining precision of plate member 131 is lower.Owing to entering in this gap, resin produces overlap.On rotating disk 13, first and second claw types become sufficient width is set between the edge 541 of parts 812,822 and opening 54, flow into resin energetically and form resin bed 65.Thereby avoid producing overlap.
Central authorities' resin component 132 is designed to make the top of pawl 633 to be positioned at pawl position through hole 66, becomes parts 812,822 to separate required power from pawl 633 first and second claw types in the time of therefore can being reduced in injection mo(u)lding.
When carrying out the injection mo(u)lding of resin, plate member 131 is carried out with respect to the plate central portion 52 that is positioned at of cover half 81 and dynamic model 82.Because this is constructed, can guarantee the area of the plate peripheral part 51 relative in the axial direction significantly with fixed magnet 123.
On the other hand, use the hole if the location is set on plate peripheral part 51, then plate peripheral part 51 can be out of shape because of the hole is set.Therefore in the present invention, the location is undertaken by location division 551, can guarantee the flatness of plate peripheral part 51, can make distance between plate peripheral part 51 and the fixed magnet 123 in each circumferential position homogeneous roughly.Therefore, can between plate member 131 and fixed magnet 123, obtain stable magnetic attracting force.
Because the location division 551 of plate member 131 be a breach, so register pin 821 is easy to insert location division 551, and plate member 131 is easy to fix on cover half 81 and dynamic model 82.Because the quantity of location division 551 is 3, therefore can stably determine the position of plate member 131 on the direction vertical with central shaft J1.
Figure 15 is the figure of other example of display plate parts.Plate member 131 has an opening 56 of the shape that the plate medium pore 55 with plate member shown in Figure 3 131 is communicated with a plurality of openings 54.In the following description, position corresponding with plate medium pore 55 in the opening 56 is called " medium pore portion 561 ", the position corresponding with opening 54 is called " peripheral openings 562 ".And, to the breach diacritic 563 that medium pore portion 561 is communicated with peripheral openings 562.Other shape of the plate member 131 of Figure 15 is identical with the plate member 131 of Fig. 3.Below, the additional same-sign of identical formation is described.
On plate member 131, form central resin component 132 shown in Figure 5 by injection mo(u)lding.With Fig. 7 similarly, the resin bed 65 at the edge 541 that covers peripheral openings 562 is set on central resin component 132.Form pawl position through hole 66 in the inboard of resin bed 65.On plate member 131, a plurality of peripheral openings 562 shown in Figure 15 are a plurality of openings overlapping respectively with a plurality of pawls position through hole shown in Figure 7 66, compare with having a plate member, can guarantee the intensity after the moulding of central resin component 132 with the overlapping big circular open of a plurality of pawls position through hole 66.
When forming central resin component 132 by injection mo(u)lding, first and second claw types shown in Figure 13 become parts 812,822 not contact with the edge 541 of peripheral openings 562.Thus, be easy to prevent that first and second claw types from becoming the interference of parts 812,822 and plate member 131.And under plate member 131 was disposed at state in the mould, register pin 821 inserted breach 563 shown in Figure 15.Breach 563 is as the location division, and fixed plate part 131 is with respect to the position of mould on the direction of vertical center axis J1.
Figure 16 is the vertical view of other examples of display plate parts.On plate member 131, be provided with 7 breach 57 that extend to radial outside from 7 openings 54.Other shape of the plate member 131 of Figure 16 and the plate member 131 of Fig. 3 are roughly the same.
When forming central resin component 132 by injection mo(u)lding, between the outer edge of plate member 131 and mould, small space is set, and in mould configuration plate member 131.Consequently, as shown in figure 17, the resin bed 65 that forms on opening 54 covers the outer edge by breach 57.
On plate member 131, first and second claw types shown in Figure 13 become parts 812,822 not contact with opening 54.Thus, be easy to prevent that first and second claw types from becoming the interference of parts 812,822 and plate member 131.In addition, also can in subsequent handling, remove the position of the outer edge of covering resin layer 65.
Figure 18 is the vertical view of other examples of display plate parts.On plate central portion 52, form 7 hole portions 521 in the position relative with 7 cast gate 811a shown in Figure 13.Omit supporting pin 823 from dynamic model 82.When forming central resin component 132, inject resins to hole portion 521 from cast gate 811a.Therefore, can not prevent the distortion of plate central portion 52 owing to resin flow push plate central portion 52 strongly.Consequently, also can prevent the axial location skew of plate peripheral part 51.
After central resin component 132 moulding, with Fig. 5 and Fig. 7 similarly, form cast gate notch 634a, cast gate notch 634a and hole portion 521 are opposed on the direction that is parallel to central shaft J1.In addition, also can on plate member 131, replace hole portion 521 and breach is set.
More than, embodiments of the present invention are illustrated, but the invention is not restricted to above-mentioned embodiment, can carry out numerous variations.For example, in the above-described embodiment, as long as pawl 633 and pawl position through hole 66 overlapping on the direction that is parallel to central shaft J1, promptly pawl 633 is overlapping with pawl position through hole 66 when overlooking central resin component 132, then the top of pawl 633 also can be positioned at the upside or the downside of pawl position through hole 66.As long as the quantity of pawl 633 is more than 2, can be other quantity.Preferably, in order to reduce since the damage of a pawl 633 to the influence of pawl 633 integral body, the quantity of pawl is 5～7.As long as the quantity of location division 551 also is more than 2, can be other quantity.Though location division 551 is a breach, also can adopt poroid location division.On plate member shown in Figure 3 131, as long as a plurality of openings overlapping with a plurality of pawls position through hole 66 are set, then pawl position through hole 66 needn't be equal number with opening 54.
Above the plate central portion 52, needn't be covered fully by resin linking part 632.As long as at least a portion on plate central portion 52, resin linking part 632 links up resin cylindrical portion 61 and gets final product with dish guide portion 631, also can adopt the rotating disk of other shape.Even in this case, be positioned at the top by the plate central portion 52 that makes plate member 131 with respect to plate peripheral part 51, thereby can prevent to coil the resin shrinkage on the guide portion 631.On central resin component 132, about plate central portion 52, the thickness of the thickness on top 63 and bottom 64 is roughly the same.But on top 63 and bottom 64 when producing distortion such as resin shrinkage respectively, the thickness of top 63 and bottom 64 can be the thickness that differs from one another.
In the above-described embodiment, when injection mo(u)lding central authorities resin component 132, can under being installed on the state of cover half 81, plate member 131 carry out matched moulds to cover half 81 and dynamic model 82.As long as the mechanism that separates rotating disk is set on cover half 81, can under the state that rotating disk is remained in cover half 81, dynamic model 82 be separated from cover half 81.
In the above-described embodiment, as shown in figure 19, by the cylindrical portion 512 corresponding with the cup parts 21 of Fig. 2 is set, thereby also rotating disk 13 can be set on the outer edge of plate member 131 in the upper end of rotating part 2.At the inboard of cylindrical portion 512 configuration rotor magnet 22.Motor 1 also can be equipped on other recording disk drive units such as hard optical disc apparatus.
The motor that the present invention can be used as various recording disk drive units utilizes.
Claims (19)
1. the rotating disk of a recording disk drive unit, this rotating disk has:
Plate member, it is made of strong magnetic material;
Central authorities' resin component, the central authorities that it is configured in above-mentioned plate member are parts that fuse that the injection mo(u)lding by resin forms,
Above-mentioned plate member has,
The plate peripheral part;
The plate central portion, it has the plate medium pore in central authorities' formation of above-mentioned plate member, and is positioned at the top with respect to above-mentioned plate peripheral part,
Above-mentioned central resin component has,
The resin cylindrical portion, it connects above-mentioned plate medium pore, constitutes central resin through hole;
The dish guide portion of boot disk medium pore;
The resin linking part, it links up above-mentioned resin cylindrical portion and dish guide portion on above-mentioned plate central portion.
2. rotating disk according to claim 1 is characterized in that, on the top of above-mentioned central resin component, is provided with a plurality of cast gate notchs in the injection mo(u)lding.
3. rotating disk according to claim 2 is characterized in that, the above-mentioned plate member of ratio of above-mentioned central resin component is by the position of downside, has by when the injection mo(u)lding and the supporting pin recess that the supporting pin of butt forms below the above-mentioned plate central portion.
4. rotating disk according to claim 2 is characterized in that, on above-mentioned plate central portion, and is being provided with hole portion or notch part with the opposed position of above-mentioned a plurality of cast gate notchs.
5. rotating disk according to claim 2 is characterized in that, the top integral body of above-mentioned plate central portion is covered by above-mentioned central resin component.
6. rotating disk according to claim 2 is characterized in that, on above-mentioned central resin component, is provided with a plurality of pawls that extend from the peripheral part of above-mentioned central resin component downwards, above-mentioned a plurality of cast gate notchs on circumferentially between above-mentioned a plurality of pawls.
7. rotating disk according to claim 1 is characterized in that, at the above-mentioned plate member of ratio of the above-mentioned central resin component position by downside, is provided with around above-mentioned central resin through hole the cyclic resin recess of depression upward.
8. rotating disk according to claim 1 is characterized in that, the moulding by punch process of above-mentioned plate member.
9. a motor possesses,
Stationary part;
Bearning mechanism;
Rotating part, it is supported on the top of above-mentioned stationary part by above-mentioned Bearning mechanism, and is supported for and can rotates with respect to above-mentioned stationary part;
Be arranged on the described rotating disk of claim 1 of the upper end of above-mentioned rotating part.
10. a recording disk drive unit has,
Make the described motor of claim 9 of recording disk rotation;
Adsorb above-mentioned plate member from the top by fixed magnet and above-mentioned recording disk is fixed on fixator on the above-mentioned rotating disk;
Above-mentioned recording disk is carried out the access portion of reading and/or writing of information;
The shell of ccontaining above-mentioned motor and above-mentioned access portion.
11. a rotating disk is used for the recording disk drive unit, this rotating disk has,
Plate member, it is made of strong magnetic material;
Central authorities' resin component, the central authorities that it is configured in above-mentioned plate member are parts that fuse that the injection mo(u)lding by resin forms,
It is the plate medium pore that above-mentioned plate member has medium pore,
Above-mentioned central resin component possesses:
The resin cylindrical portion, it has the central resin through hole that connects above-mentioned plate medium pore;
The dish guide portion of boot disk medium pore;
The resin linking part, it links up above-mentioned resin cylindrical portion and above-mentioned dish guide portion on above-mentioned dish guide member,
Be provided with a plurality of cast gate notchs in the injection mo(u)lding on the top of above-mentioned central resin component.
12. rotating disk according to claim 11 is characterized in that, on above-mentioned central resin component, is provided with a plurality of pawls that extend from the peripheral part of above-mentioned central resin component downwards, above-mentioned a plurality of cast gate notchs on circumferentially between above-mentioned a plurality of pawls.
13. rotating disk according to claim 11 is characterized in that, at the above-mentioned plate member of ratio of the above-mentioned central resin component position by downside, is provided with around above-mentioned central resin through hole the cyclic resin recess of depression upward.
14. rotating disk according to claim 11 is characterized in that, the moulding by punch process of above-mentioned plate member.
15. a motor possesses,
Stationary part;
Bearning mechanism;
Rotating part, it is supported on the top of above-mentioned stationary part by above-mentioned Bearning mechanism, and is supported for and can rotates with respect to above-mentioned stationary part;
Be arranged on the described rotating disk of claim 11 of the upper end of above-mentioned rotating part.
16. a recording disk drive unit has:
Make the described motor of claim 15 of recording disk rotation;
Adsorb above-mentioned plate member from the top by fixed magnet and above-mentioned recording disk is fixed on fixator on the above-mentioned rotating disk;
Above-mentioned recording disk is carried out the access portion of reading and/or writing of information;
The shell of ccontaining above-mentioned motor and above-mentioned access portion.
17. the manufacture method of a rotating disk, this rotating disk is used for the recording disk drive unit, and the manufacture method of this rotating disk comprises,
The plate member that is made of strong magnetic material is installed on a side of two moulds, and the above-mentioned plate member of clamping is carried out matched moulds and is formed the operation of die cavity;
By in above-mentioned chamber, injecting resin, in the central authorities of above-mentioned plate member, form the operation of central resin component as the parts that fuse,
In the operation that forms above-mentioned central resin component, in above-mentioned die cavity, inject resin from a plurality of cast gates that are provided with in the position corresponding with the top of above-mentioned central resin component.
18. the manufacture method of rotating disk according to claim 17 is characterized in that,
The central portion of above-mentioned plate member is the plate central portion, is that the plate peripheral part is positioned at the top with respect to the peripheral part of above-mentioned plate member, in the operation that forms above-mentioned die cavity, and the following butt of supporting pin and above-mentioned plate central portion.
19. the manufacture method of rotating disk according to claim 17 is characterized in that,
The central portion of above-mentioned plate member is the plate central portion, is that the plate peripheral part is positioned at the top with respect to the peripheral part of above-mentioned plate member,
Above-mentioned plate central portion has hole portion or notch part in the position relative with above-mentioned a plurality of cast gates,
In the operation that forms above-mentioned central resin component, inject resin to above-mentioned hole portion or above-mentioned notch part from above-mentioned a plurality of cast gates.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-137538 | 2009-06-08 | ||
| JP2009137538A JP4683347B2 (en) | 2009-06-08 | 2009-06-08 | Turntable and method for manufacturing turntable |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110308325.2A Division CN102385882B (en) | 2009-06-08 | 2010-06-08 | Turntable and method for manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101908350A true CN101908350A (en) | 2010-12-08 |
| CN101908350B CN101908350B (en) | 2012-04-18 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101985055A Active CN101908350B (en) | 2009-06-08 | 2010-06-08 | Turntable and method for manufacturing the same |
| CN201110308325.2A Active CN102385882B (en) | 2009-06-08 | 2010-06-08 | Turntable and method for manufacturing the same |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110308325.2A Active CN102385882B (en) | 2009-06-08 | 2010-06-08 | Turntable and method for manufacturing the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8438588B2 (en) |
| JP (1) | JP4683347B2 (en) |
| KR (1) | KR101097481B1 (en) |
| CN (2) | CN101908350B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137150A (en) * | 2011-11-22 | 2013-06-05 | 阿尔派株式会社 | Disc player |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101120292B1 (en) * | 2009-06-08 | 2012-03-06 | 니혼 덴산 가부시키가이샤 | Turntable and method for manufacturing the same |
| JP2011054260A (en) * | 2009-08-07 | 2011-03-17 | Nippon Densan Corp | Turntable |
| KR101101642B1 (en) * | 2010-07-16 | 2012-01-02 | 삼성전기주식회사 | Motor and disk driving device equipped with the same |
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Also Published As
| Publication number | Publication date |
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| KR20100131944A (en) | 2010-12-16 |
| KR101097481B1 (en) | 2011-12-22 |
| CN102385882B (en) | 2015-01-21 |
| JP4683347B2 (en) | 2011-05-18 |
| JP2010282709A (en) | 2010-12-16 |
| US20100313212A1 (en) | 2010-12-09 |
| US8438588B2 (en) | 2013-05-07 |
| CN101908350B (en) | 2012-04-18 |
| CN102385882A (en) | 2012-03-21 |
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